#1B5379#1B5379

#1B5379 is a dark, moderate cyan. Relative luminance 0.078; OKLCH L 42.5% C 0.085 H 242.6°. Best body text is #FFFFFF at 8.20:1 contrast (WCAG AA passes).

Color values

HEX	#1B5379
RGB	rgb(27, 83, 121)
HSL	hsl(204, 64%, 29%)
HSV	hsv(204, 78%, 47%)
CMYK	cmyk(77.7%, 31.4%, 0%, 52.5%)
CIE-LAB	lab(33.56, -4.09, -26.75)
CIE-LCH	lch(33.56, 27.06, 261.30°)
OKLab	oklab(42.5% -0.0393 -0.0757)
OKLCH	oklch(42.5% 0.085 242.6)
XYZ	xyz(6.9951, 7.7992, 19.2222)
Luminance	0.0780 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5379 #79411B

analogous

#1B7970 #1B5379 #1B2479

triadic

#1B5379 #791B53 #53791B

tetradic

#1B5379 #701B79 #79411B #24791B

square

#1B5379 #701B79 #79411B #24791B

split-complementary

#1B5379 #791B24 #79701B

monochromatic

#061119 #103147 #1B5379 #2675AB #3B96D3

Accessibility & contrast

On white

8.20

#1B5379 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#1B5379 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5379

8.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5379	#FFFFFF	#000000	##FFFFFF
##1B5379	1.00	8.20	2.56	8.20
#FFFFFF	8.20	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#41547B

Deuteranopia (green-blind)

#344B78

Tritanopia (blue-blind)

#005C60

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #1b5379;
/* rgb */ color: rgb(27, 83, 121);
/* oklch */ color: oklch(42.5% 0.085 242.6);

Tailwind

colors: {
  custom: {
    50: '#6683a0',
    500: '#1b5379',
    950: '#000000',
  },
}

SCSS

$custom: #1b5379;
$custom-light: #6683a0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5379",
  "rgb": {
    "r": 27,
    "g": 83,
    "b": 121
  },
  "hsl": {
    "h": 204.255,
    "s": 63.514,
    "l": 29.02
  },
  "oklch": {
    "l": 0.42501,
    "c": 0.08529,
    "h": 242.6
  },
  "luminance": 0.078
}

Semantic roles & 50–950 ramp

primary

#1B5379

secondary

#AD6E43

accent

#8441E7

background

#F6F8F9

surface

#EBEFF2

border

#C6CACC

text

#060A0E

muted

#7A7C7E

Preview Lab

Preview with #1B5379

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →